<template>
  <view>
   <view class="search-box">
     <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
   </view>
   <!-- 搜索建议列表 -->
   <view class="sugg-list">
     <view class="sugg-item" v-for="(item,i) in searchResults" :key="item.goods_id" @click="gotoDetail(item)">
       <view class="goods-name">
        {{item.goods_name}}
       </view>
        <uni-icons type="arrowright" size="16"></uni-icons>
     </view>
   </view>
   <!-- 搜索历史 -->
   <view class="history-box">
     <!-- 标题区域 -->
     <view class="history-title">
       <text>搜索历史</text>
       <uni-icons type="trash" size="17" @click="clean"></uni-icons>
     </view>
     <!-- 列表区域 -->
     <view class="history-list">
      <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
     </view>
   </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw:'',
        //搜索的结果列表
        searchResults:[],
        //搜索历史结果列表
        historyList: ['aa','bb']
      }
    },
    onLoad(){
      this.historyList = JSON.parse(uni.getStorageSync('kw')||'[]')
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
    ,
    methods:{
      //input输入事件
      input(e){
        //清除延时器
        clearTimeout(this.timer)
        
        this.timer = setTimeout(()=>{
         this.kw = e
         this.getSearchList()
        },500)
      },
      async getSearchList(){
        //判断搜索关键词是否为空
        if(this.kw.length===0){
          this.searchResults = []
          return
        }
        const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status !==200) return uni.$showMsg()
        this.searchResults = res.message
        this.saveSearchHistory()
      },
      //单机搜索itme跳转
      gotoDetail(item){
       uni.navigateTo({
         url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
       })
      },
      // 保存搜索历史记录
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        // 将set转换成新的数组赋值给historyList
        this.historyList = Array.from(set)
        // 将历史记录存储到本地
       uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      //清空历史记录
      clean(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      },
      //点击搜索历史
      gotoGoodsList(item){
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?query='+item
        })
      }
    }
  }
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #00ff00;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}
.history-box{
  padding: 0 10px;
  .history-title{
    display: flex;
    justify-content: space-between;
    margin: 0 10px;
    height: 40 px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    .uni-tag{
      margin-top:5px;
      margin-right:5px;
    }
  }
}
</style>
